Double Star Calculator - Orbit

Orbital Elements for HU225AB

WDS:	HU225AB	WDS ID/Discoverer
P:	125.940	Orbital period (years)
a:	0.341	Semi-major axis (arcseconds)
i:	46.0	Inclination (degrees)
Ω:	68.4	Longitude of ascending node (degrees)
T:	1944.210	Epoch of periastron passage (year)
e:	0.331	Eccentricity
ω:	9.5	Longitude of periastron (degrees)
Start-Year:	1962.03	Year
End-Year:	2087.97	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU225AB
Position:	090005.14-122739.4	Epoch-2000 right ascension and declination
WDS-ID:	09001-1228	WDS designation
Discoverer Code:	HU225AB	Discover designation and components
ADS number:	7131	Aitken Double Star catalog
HD number:	77126	HD catalog number
Hipparcos number:	44190	Hipparcos catalog number
V1:	9.18	Magnitude of the primary
V2:	8.60	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2011	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Doc2015f	Reference

Double Star Orbit for HU225AB

WDS 6th Orbit including measures of HU225AB

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of HU225AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.376   278.88
--------------------------
1962.03    0.210   168.83
1963.03    0.216   173.63
1964.03    0.223   178.14
1965.03    0.231   182.37
1966.03    0.239   186.33
1967.03    0.247   190.03
1968.03    0.256   193.48
1969.03    0.264   196.70
1970.03    0.273   199.71
1971.03    0.282   202.53
1972.03    0.291   205.18
1973.03    0.300   207.67
1974.03    0.309   210.01
1975.03    0.318   212.23
1976.03    0.327   214.33
1977.03    0.335   216.32
1978.03    0.343   218.21
1979.03    0.351   220.02
1980.03    0.359   221.75
1981.03    0.366   223.41
1982.03    0.374   225.00
1983.03    0.380   226.53
1984.03    0.387   228.01
1985.03    0.393   229.44
1986.03    0.399   230.83
1987.03    0.405   232.17
1988.03    0.410   233.49
1989.03    0.416   234.76
1990.03    0.420   236.01
1991.03    0.425   237.23
1992.03    0.429   238.43
1993.03    0.433   239.60
1994.03    0.436   240.75
1995.03    0.439   241.89
1996.03    0.442   243.02
1997.03    0.444   244.12
1998.03    0.446   245.22
1999.03    0.448   246.31
2000.03    0.450   247.39
2001.03    0.451   248.47
2002.03    0.452   249.54
2003.03    0.452   250.60
2004.03    0.452   251.67
2005.03    0.452   252.73
2006.03    0.452   253.80
2007.03    0.451   254.87
2008.03    0.450   255.94
2009.03    0.448   257.03
2010.03    0.446   258.11
2011.03    0.444   259.21
2012.03    0.442   260.32
2013.03    0.439   261.44
2014.03    0.436   262.58
2015.03    0.433   263.73
2016.03    0.429   264.90
2017.03    0.426   266.10
2018.03    0.421   267.31
2019.03    0.417   268.55
2020.03    0.412   269.82
2021.03    0.407   271.11
2022.03    0.402   272.44
2023.03    0.397   273.81
2024.03    0.391   275.22
2025.03    0.385   276.67
2026.03    0.379   278.16
2027.03    0.372   279.71
2028.03    0.366   281.31
2029.03    0.359   282.97
2030.03    0.352   284.70
2031.03    0.345   286.49
2032.03    0.337   288.37
2033.03    0.330   290.33
2034.03    0.322   292.38
2035.03    0.315   294.52
2036.03    0.307   296.78
2037.03    0.299   299.15
2038.03    0.292   301.65
2039.03    0.284   304.27
2040.03    0.277   307.05
2041.03    0.269   309.98
2042.03    0.262   313.07
2043.03    0.255   316.33
2044.03    0.248   319.76
2045.03    0.242   323.39
2046.03    0.236   327.20
2047.03    0.231   331.19
2048.03    0.226   335.36
2049.03    0.222   339.71
2050.03    0.218   344.20
2051.03    0.215   348.84
2052.03    0.213   353.58
2053.03    0.212   358.40
2054.03    0.211     3.27
2055.03    0.211     8.17
2056.03    0.212    13.04
2057.03    0.213    17.88
2058.03    0.214    22.66
2059.03    0.216    27.36
2060.03    0.218    31.97
2061.03    0.221    36.49
2062.03    0.223    40.92
2063.03    0.225    45.26
2064.03    0.227    49.52
2065.03    0.228    53.73
2066.03    0.229    57.89
2067.03    0.230    62.02
2068.03    0.229    66.16
2069.03    0.228    70.32
2070.03    0.227    74.52
2071.03    0.224    78.80
2072.03    0.222    83.18
2073.03    0.218    87.68
2074.03    0.215    92.33
2075.03    0.211    97.15
2076.03    0.207   102.15
2077.03    0.203   107.35
2078.03    0.199   112.73
2079.03    0.196   118.30
2080.03    0.194   124.02
2081.03    0.193   129.86
2082.03    0.192   135.76
2083.03    0.192   141.66
2084.03    0.194   147.50
2085.03    0.197   153.22
2086.03    0.200   158.75
2087.03    0.205   164.07

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 16:13:22